变压器式可控电抗器限流电感计算

发布时间：2018-07-14 17:19

【摘要】：变压器式可控电抗器(CRT)以固定单支路调节模式运行时具有优越的谐波性能,而为其各限流电感匹配合适的参数则是实现固定单支路调节模式的关键所在。基于CRT的自、互电感电路方程,导出CRT工作绕组瞬时电流及其基波分量有效值的计算公式,进而引入调节过程及容量区间的概念。根据CRT固定单支路调节模式的切换流程,一方面基于CRT输出容量连续且各容量区间重叠最小的原则,建立了求解各限流电感的优化模型;另一方面按照已有文献认为各控制绕组电流互不影响的理想情况建立了求解限流电感的非线性方程组。最后设计算例,借助Matlab优化工具箱进行求解,结果表明按理想情况求出的限流电感会造成大范围容量断续,是不可取的,而采用所提出的优化方法得出的参数则能有效地实现CRT的固定单支路调节模式。
[Abstract]:Transformer controllable reactor (CRT) has excellent harmonic performance when it operates in fixed single branch regulation mode, and matching appropriate parameters for its current limiting inductance is the key to realize fixed single branch regulation mode. Based on the self-inductance circuit equation of CRT, the formulas for calculating the instantaneous current of CRT working winding and the effective value of its fundamental component are derived, and the concepts of regulating process and capacity interval are introduced. According to the switching process of CRT fixed single branch regulation mode, on the one hand, based on the principle of continuous output capacity of CRT and minimum overlap of each capacity interval, an optimization model for solving the current limiting inductance is established. On the other hand, the nonlinear equations of current limiting inductance are established according to the ideal conditions in which the current of the control windings does not affect each other. Finally, an example is designed and solved with the help of Matlab optimization toolbox. The results show that the current limiting inductance calculated according to the ideal condition will cause a wide range of capacity discontinuity, which is not advisable. The parameters obtained by the proposed optimization method can effectively realize the fixed single branch regulation mode of CRT.
【作者单位】：兰州交通大学自动化与电气工程学院;
【基金】：国家自然科学基金(51167009、51367010) 甘肃省科技计划项目(1304WCGA181) 兰州市科技计划项目(2013-4-111)资助
【分类号】：TM47

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